beautifed code and added descriptive comments

application/admin.py

 
 from .models import Post, CustomUser
 
+
 #external code customised
 #import from https://docs.djangoproject.com/en/dev/topics/auth/customizing/#extending-the-existing-user-model
+#start ---
 class CustomUserInline(admin.StackedInline):
     model = CustomUser
     can_delete = False
     verbose_name_plural = 'customUsers'
 
-#external code customised
-#import from https://docs.djangoproject.com/en/dev/topics/auth/customizing/#extending-the-existing-user-model
+
 # Define a new User admin
 class UserAdmin(BaseUserAdmin):
     inlines = (CustomUserInline, )
 
-#external code customised
-#import from https://docs.djangoproject.com/en/dev/topics/auth/customizing/#extending-the-existing-user-model
+
 # Re-register UserAdmin
 admin.site.unregister(User)
 admin.site.register(User, UserAdmin)
 admin.site.register(Post)
-
+#end ---

application/forms.py

 
 from taggit.forms import *
 
+
 #extended code customised
 #import from https://tutorial.djangogirls.org/en/django_forms/
 class PostForm(forms.ModelForm):

application/models.py

 from django.db import models
+
 from django.contrib.auth.models import User
 from django.utils import timezone
+
 from taggit.managers import TaggableManager
 from datetime import datetime
-from croniter import croniter
-
 
 
+#external code customised
+#import from https://docs.djangoproject.com/en/dev/topics/auth/customizing/#extending-the-existing-user-model
 class CustomUser(models.Model):
     user = models.OneToOneField(User, null=True, on_delete=models.CASCADE)
+    #add tags to User Model with possibility to leave empty
     tags = TaggableManager(blank=True)
 
+
+#external code customised
+#import from https://tutorial.djangogirls.org/en/django_models/
 class Post(models.Model):
     author = models.ForeignKey('auth.User', on_delete=models.CASCADE)
     title = models.CharField(max_length=200)
     text = models.TextField()
-    created_date = models.DateTimeField(
-        default=timezone.now)
-    published_date = models.DateTimeField(
-        blank=True, null=True)
+    created_date = models.DateTimeField(default=timezone.now)
+    published_date = models.DateTimeField(blank=True, null=True)
+    #add tags to Post Model
     tags = TaggableManager()
 
     def publish(self):

application/templates/base.html

             </div>
         </nav>
 
+        <!-- Content -->
         <div class="content container">
             <div class="row">
                 <div class="col-md-12">
         <script src="{% static 'js/app.js' %}"></script>
         <script src="{% static 'bootstrap/js/bootstrap.bundle.js' %}"></script>
     </body>
-
 </html>

application/templates/post_detail.html

+<!-- 
+marked parts of the template is external code
+import from https://tutorial.djangogirls.org/en/template_extending/ 
+-->
 {% extends 'base.html' %}{% block content %}
 {% load hitcount_tags %}
 <div class="col-md-8">
+
+    <!-- imported start -->
     <div class="post">
         {% if post.published_date %}
         <div class="date">
         </div>
         {% else %}
         <a class="btn btn-outline-dark" href="{% url 'post_publish' pk=post.pk %}">Publish</a>
+    <!-- imported end -->
+
         {% endif %} {% if user.is_staff and user == post.author %}
+
+        <!-- imported start -->
         <a class="btn btn-outline-dark" href="{% url 'post_edit' pk=post.pk %}">
             <span class="glyphicon glyphicon-pencil">Bearbeiten</span>
         </a>
         {% endif %}
         <h1>{{ post.title }}</h1>
         <p>{{ post.text|linebreaksbr }}</p>
+        <!-- imported end -->
         <p>
             Tags:
             {% for tag in post.tags.all %}

application/templates/post_draft_list.html

+<!-- 
+external code
+import from https://tutorial.djangogirls.org/en/template_extending/ 
+-->
 {% extends 'base.html' %}
-
 {% block content %}
 <div class="row">
     <div class="col-md-8">

application/templates/post_edit.html

+<!-- 
+external code
+import from https://tutorial.djangogirls.org/en/template_extending/ 
+-->
 {% extends 'base.html' %}
-
 {% block content %}
 <div class="row">
     <div class="mx-auto">

application/templates/post_list.html

+<!-- 
+marked parts of the template is external code
+import from https://tutorial.djangogirls.org/en/template_extending/ 
+-->
 {% extends 'base.html' %} {% block content %}
 <div class="row">
     {% if tag %} <div class="mx-auto">
         <h2> Artikel mit dem Tag "{{ tag.name }}" </h2>
     </div>{% endif %}
 </div>
+<!-- imported start -->
 <div class="row">
     <div class="mx-auto">
         <h1> Artikleübersicht </h1>
     </div>
 </div>
-</div>
+<!-- imported end -->
+
 <div class="row">
     <div class="col-md-8">
-
-        {% if messages %} 
+        {% if messages %}
         <div class="messages">
             {% for message in messages %}
             <p {% if message.tags %} class="{{ message.tags }}" {% endif %}>{{ message }}</p>
             {% endfor %}
         </div>
+
+        <!-- imported start -->
         {% endif %}
         {% for post in posts %}
         <div class="mt-5 post">
                 <a href="{% url 'post_detail' pk=post.pk %}">{{ post.title }}</a>
             </h2>
             <p>{{ post.text|linebreaks }}</p>
+        <!-- imported end -->
+
             Tags: {% for tag in post.tags.all %}
             <a href="{% url 'post_list_by_tag' tag.slug %}">{{ tag.name }}</a>
             {% if not forloop.last %}, {% endif %} {% endfor %} <p>

application/templates/search_add.html

+<!-- 
+marked parts of the template is external code
+import from https://github.com/fizista/django-taggit-templatetags2
+-->
 {% extends "base.html" %} {% block content %}
+
+<!-- imported start -->
 {% load taggit_templatetags2_tags %}
 <div class="container">
     <div class="row equal">
-        <div class="col-md-6" >
+        <div class="col-md-6">
             <h1> Alle Tags im Überblick<br>
             </h1>
             <div class="col-md-8" style="zoom: 1.6">
                     {% include_tagcloud 'application.Post' %}
                 </div>
             </div>
+<!-- imported end -->
+
             <div style="padding-bottom:40px;">
             </div>
             Tag-Suche
                     {% endfor %}
                 </div>
             </div>
-
         </div>
         <div class="col-md-6">
             <h1> Bereits abonnierten Tags
                     {% for tag in tagsuser %}
                     <a class="text-white bg-dark p-3" href="{% url 'post_list_by_tag' tag.slug %}">{{ tag.name }}</a>
                     {% endfor %}
-
                 </div>
                 {% endif %}
             </div>
             <div style="padding-bottom:145px;">
             </div>
             <div class="mx-auto">
-
                 <div>
                     Abonniere deine Tags hier!
                 </div>
                     {% csrf_token %} {{form.as_p}}
                     <button type="submit" class="save btn btn-outline-dark">Sichern</button>
                 </form>
-
                 {% if messages %}
                 {% for message in messages %}
                 <div {% if message.tags %} class="{{ message.tags }}" {% endif %}>{{ message }}</div>

application/templates/tag_list.html

+<!-- 
+marked parts of the template is external code
+import from https://tutorial.djangogirls.org/en/template_extending/ 
+-->
 {% extends "base.html" %} {% block content %}
 {% load taggit_templatetags2_tags %}
 <div class="row">
 <div class="row">
     <div class="col-md-8">
         <div>
+
+            <!-- imported start -->
             {% for post in posts %}
             <div class="mt-5 post">
                 <div class="date">
                 <h2>
                     <a href="{% url 'post_detail' pk=post.pk %}">{{ post.title }}</a>
                 </h2>
+            <!-- imported end  -->
+
                 <p>{{ post.text|linebreaks }}</p>
                 Tags: {% for tag in post.tags.all %}
                 <a href="{% url 'post_list_by_tag' tag.slug %}">{{ tag.name }}</a>
             </a>
         </div>
     </div>
-
 </div>
 {% endblock %}

application/templates/tag_remove.html

-{% extends 'base.html' %} {% block content %} 
-{% if tag %} Posts tagged with "{{ tag.name }}" {% endif %} 
-{% for post in posts %}
-<div class="post">
-    <div class="date">
-        {{ post.published_date }}
-    </div>
-    <h1>
-        <a href="{% url 'post_detail' pk=post.pk %}">{{ post.title }}</a>
-    </h1>
-    <p>{{ post.text|linebreaks }}</p>
-    Tags: {% for tag in post.tags.all %}
-    <a href="{% url 'student_page_remove' tag.slug %}">{{ tag.name }}</a>
-    {% if not forloop.last %}, {% endif %} {% endfor %} <p>
-        {{ post.author }}
-    </p>
-</div>
-{% endfor %} 
-</div>
-{% endblock %}

application/urls.py

 from taggit_templatetags2 import urls as taggit_templatetags2_urls
 import debug_toolbar
 
-
-
 urlpatterns = [
     url(r'^$', views.tag_list, name='tag_list'),
     url(r'^tag/(?P<slug>[-\w]+)/$', views.post_list, name='post_list_by_tag'),
     url(r'^tags/', include('taggit_templatetags2.urls')),
 ]
 
-
 #external code
 #import from https://django-debug-toolbar.readthedocs.io/en/latest/installation.html
 if settings.DEBUG:

application/views.py

+import logging
+import mysite.settings
+
 from django.shortcuts import render, get_object_or_404
+from django.contrib.auth import authenticate, login, logout
+from django.contrib.auth.decorators import login_required
+from django.shortcuts import redirect
 from django.utils import timezone
+from django.contrib.admin.views.decorators import staff_member_required
+from django.contrib.auth.models import User
+
 from .models import Post, CustomUser
 from taggit.models import Tag
-from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 from .forms import PostForm, NewTagForm
-from django.shortcuts import redirect
-from django.contrib.auth.decorators import login_required
-from django.contrib.admin.views.decorators import staff_member_required
-from django.contrib.auth import authenticate, login, logout
-import sys
-import collections
-from taggit_templatetags2.views import TagCanvasListView
-from django.contrib.auth.models import User
 from django.contrib import messages
-from post_office.models import EmailTemplate
 from post_office import mail
-
 from hitcount.models import HitCount
 from hitcount.views import HitCountMixin
 
 
-import logging
-import mysite.settings
-import operator
-
-
 def navlogin(request):
     log = logging.getLogger('mysite')
     logout(request)
     context = {'error': error}
     return render(request, 'index.html', context)
 
-
+#external code customised
+#import from https://tutorial.djangogirls.org/en/django_forms/
+#start ---
 @login_required
 def post_list(request, slug=None):
     log = logging.getLogger('mysite')
     messages.info(request, 'Der Artikel "' + post.title + '" wurde gelöscht')
     post.delete()
     return redirect('post_list')
-
+#end ---
 
 @login_required
 def tag_list(request):
         form = NewTagForm()
     return render(request, 'search_add.html', locals())
 
+
+#external code customised
+#import from https://github.com/ui/django-post_office
 mail.send(
-    'kleinhenz.e@gmail.com', # List of email addresses also accepted
+    # List of email addresses also accepted
+    'kleinhenz.e@gmail.com', 
     'esther.kleinhenz@web.de',
     subject='My email',
     message='Hi there!',

log.txt

 [07/Dec/2018 19:55:08] INFO [mysite:147] <QuerySet [<Post: Kein bisschen Fränkisch>, <Post: Das ist ein Titel>, <Post: Strange Things>, <Post: Hier kommt was neues>, <Post: Bavaria>, <Post: test>]>
 [07/Dec/2018 19:55:08] INFO [mysite:147] <QuerySet []>
 [07/Dec/2018 19:55:08] INFO [mysite:147] <QuerySet [<Post: Kein bisschen Fränkisch>, <Post: Das ist ein Titel>, <Post: Hier kommt was neues>, <Post: Bavaria>]>
+[09/Dec/2018 19:06:28] INFO [mysite:128] <QuerySet [<Tag: hi>, <Tag: test>, <Tag: two>, <Tag: second>]>
+[09/Dec/2018 19:06:29] INFO [mysite:131] <QuerySet [<Post: Das ist ein Titel>, <Post: Strange Things>, <Post: Hier kommt was neues>]>
+[09/Dec/2018 19:06:29] INFO [mysite:131] <QuerySet [<Post: Kein bisschen Fränkisch>, <Post: Das ist ein Titel>, <Post: Strange Things>, <Post: Hier kommt was neues>, <Post: Bavaria>, <Post: test>]>
+[09/Dec/2018 19:06:29] INFO [mysite:131] <QuerySet []>
+[09/Dec/2018 19:06:29] INFO [mysite:131] <QuerySet [<Post: Kein bisschen Fränkisch>, <Post: Das ist ein Titel>, <Post: Hier kommt was neues>, <Post: Bavaria>]>
+[09/Dec/2018 19:20:36] INFO [mysite:128] <QuerySet [<Tag: hi>, <Tag: test>, <Tag: two>, <Tag: second>]>
+[09/Dec/2018 19:20:37] INFO [mysite:131] <QuerySet [<Post: Das ist ein Titel>, <Post: Strange Things>, <Post: Hier kommt was neues>]>
+[09/Dec/2018 19:20:37] INFO [mysite:131] <QuerySet [<Post: Kein bisschen Fränkisch>, <Post: Das ist ein Titel>, <Post: Strange Things>, <Post: Hier kommt was neues>, <Post: Bavaria>, <Post: test>]>
+[09/Dec/2018 19:20:37] INFO [mysite:131] <QuerySet []>
+[09/Dec/2018 19:20:37] INFO [mysite:131] <QuerySet [<Post: Kein bisschen Fränkisch>, <Post: Das ist ein Titel>, <Post: Hier kommt was neues>, <Post: Bavaria>]>

mysite/settings.py

 
 AUTH_PROFILE_MODULE = 'application.CustomUser'
 
+
 #Log Configuration
+#external code
+#import form https://docs.djangoproject.com/en/2.1/topics/logging/
+
 LOGGING = {
     'version': 1,
     'disable_existing_loggers': True,
     }
 }
 
+#Logging Addon
+#external code
+#import from https://django-debug-toolbar.readthedocs.io/en/latest/installation.html
 
 if DEBUG:
    INTERNAL_IPS = ('127.0.0.1', 'localhost',)
        'INTERCEPT_REDIRECTS': False,
    }
 
-EMAIL_BACKEND = 'post_office.EmailBackend'
+#E-Mail administration
+#external code customised
+#import from https://github.com/ui/django-post_office
 
+EMAIL_BACKEND = 'post_office.EmailBackend'
 EMAIL_HOST = 'smtp.web.de'
 EMAIL_HOST_USER = "esther.kleinhenz@web.de"
 EMAIL_PORT = 25  # default smtp port	

mysite/urls.py

 from django.conf.urls import include, url
 from django.views.generic import TemplateView
 
-
 from django.contrib.auth import views
 import application.views